Ask The Driving School Instructor: Braking Distance VS Stopping Distance
doubt : I ’ megabyte studying for my drive examination and I ’ m confused about the difference between stopping outdistance and braking outdistance .
answer : It can be a little confuse, I ’ ll try to sort it out for you .
If you encounter an hand brake on the road requiring you to stop abruptly, there are two parts that make up the total intercept distance.
- Reaction distance
- Braking distance
When you ’ re in an emergency situation, it takes time to react to the hand brake, to brake, and to ultimately bring your vehicle to a complete check. Remember that your vehicle is traveling a amazingly farseeing outdistance every second. At 40 miles per hour, your vehicle will travel approximately 60 feet per second and a fortune can happen in that short-change sum of time .
The meter it takes you to react and respond to an hand brake can be broken down into three parts :
- Perception or awareness time
- Decision time
- Action time
Let ’ s spirit at each depart by imagining a scenario that requires you to make a sudden catch. Let ’ s say that you are traveling at 40 miles per hour when the driver of the car ahead of you on the spur of the moment applies his brakes .
The percept or awareness time is how long it takes before you are even mindful that the driver ahead is on the spur of the moment stopping. If you aren ’ thyroxine expecting an emergency, it will take time before you realize that the car ahead is suddenly braking
now that you ’ ra aware of the emergency ahead, you have to decide what to do. Will you hit the brakes or swerve into another lane to go around ? If you try to change lanes, is the lane clear up or are there other vehicles that may be in the way ? It takes time to decide what to do. In our emergency, let ’ s say that you decide to hit the brakes but that decision took time
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now that you ’ ve decided you ’ re going to brake, you have to move your foot from the accelerator pedal to the bracken pedal and push it all the way down. That besides ate up cute time .
For the average person, the entire chemical reaction time can take from three-quarters to a full moment. At 40 miles per hour, if your reaction time is one full second, you ’ ll have traveled about 60 feet before applying the brakes .
now that you ’ ve applied the brakes, it still takes time to come to a arrant discontinue. For an average car that weighs about 3,000 pounds, that can take up to 60 feet .
Total stopping distance
therefore, the total break distance is made up of both the reaction distance plus the brake distance. Adding the two in concert means that, at 40 miles per hour, it can take up to 120 feet before your vehicle will come to a dispatch stop. That ’ mho why maintaining a dependable following distance between you and the fomite ahead is therefore important.
Xem thêm: Wikipedia
To test your reaction prison term, inflict : How fast is your reaction meter ?